Home > Companies > Marmox (UK) Ltd > Multiboard (Internal)

Waterproof, thermally insulating tile backer board for internal use. An external board is available, specified separately.

Features and benefits:

  • Lightweight.
  • Provides an effective decoupling layer between the tiled surface and the substructure. This helps to prevent tiles and grout from cracking due to horizontal movement in the floor.
  • The surface allows heavy weights to be safely and securely fixed to walls.
  • Impermeable to water, and acts as a moisture barrier; can therefore be used in areas prone to moisture such as kitchens and bathrooms.
  • Thermal insulation is unaffected by various temperatures (including freezing).
  • The cementitious surface is resistant to heat and the chemicals in the sheathing around electric underfloor heating elements, making it safe to use with these types of systems.
  • Can easily be cut in straight lines.
  • Provides enhanced tile adhesion.
  • Can be tiled over or plaster finished, and therefore acts as an alternative to laminated thermal plasterboard.
  • Load bearing capacity exceeds 100 kg/m² on walls, and 40 kg/m² on floors.
  • Boards can be aligned horizontally or vertically.
  • Does not contain any hazardous substances.
  • Manufactured in accordance with ISO 9001 Quality Management Systems and BS EN 5385-2, and CE marked to EN 13164.

Applications:

Can be used to insulate and waterproof internal walls, floors and ceilings. Thicker units can be used to construct shelving units and bathroom furniture.

Boards should be stored flat. Should be covered with scrim/ reinforcing tape. For fitting instructions onto different types of substrate, consult manufacturer's literature.

Related literature

The following content references this product:

Standard product features

Material:

Extruded polystyrene (XPS), covered on both sides with fibreglass mesh, encased in a 0.75 mm layer of polymer modified concrete which permanently bonds to the mesh polystyrene.

Technical characteristics:

- Foam component:

  • Density (to DIN 53420): 36 kg/m³.
  • Thermal conductivity (K-value, to EN 13164): 0.027–0.034 W/m·K.
  • Compressive strength (10% deflection, to EN 826): 300 kN/m².
  • Water absorption (2 day immersion, to EN 12087): <1% by volume.
  • Water absorption (capillary, to DIN 53428): 0.
  • Coefficient of linear expansion (to ASTM E-831): 0.07 mm/mK.
  • Water vapour diffusion factor (to EN 12086): 110–225.
  • Fire behaviour (to EN 13501): Euroclass E.
  • Ozone depleting potential (ODP): 0.
  • Global warming potential (GWP): <0.29.

- Multiboard (generally):

  • Declared thermal conductivity after five years (to BS EN 13164): 0.036 W/m·K.
  • Compressive strength (10% compression, to EN 826): >400 kPa.
  • Maximum tile loading weight: >100 kg/m² (dependent on adhesive and wall type).
  • Flexural strength (to ASTM C203): >200 kPa.
  • Water vapour permeability (to EN 12086): 3.2 m.
  • Coefficient of linear expansion (to ASTM D-696): 30 x 10^-6 K^-1.
  • Fire propagation (to BS 476-6): 8.1, Class 0.
  • Spread of flame (to BS 476-7): 1, Class 0.
  • Impact sound reduction (to BS EN 140-8): 21 dB.
  • Working temperature range: -50°C to 75°C.

Options

Product reference:

Subsequent numbers are appropriate board thicknesses (e.g. IW1-4-60 relates to board thickness 4–60 mm). Please ensure thickness selected corresponds with product reference chosen. View manufacturer's literature for more information on specific product references.

Thickness:

Allow for dimensional tolerances of ±1 mm.

NBS Specification

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This product is associated with the following NBS Create clause:
45-45-65/410 Extruded polystyrene (XPS) board

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

Marmox (UK) Ltd

Tel:

+44 (0)1634 835290

Product reference

[IF1-4-60]
-
Internal floors. For concrete floors. To be fixed with adhesive.
[IF2-4-60]
-
Internal floors. For plywood sheet flooring. To be fixed with adhesive or mechanically.
[IF3-4-60]
-
Internal floors. For chipboard/ oriented strand board (OSB) flooring panels. To be fixed with adhesive or mechanically.
[IF4-10-60]
-
Internal floors. For traditional floorboards. To be fixed with adhesive.
[IF5-6-60]
-
Internal floors. For raised access flooring. To be fixed with adhesive.
[IW1-4-60]
-
Internal walls. For concrete block and brick substrates (flat). To be fixed with adhesive.
[IW2-12-60]
-
Internal walls. For concrete block and brick substrates (uneven). To be fixed mechanically.
[IW3-4-60]
-
Internal walls. For aircrete block walls. Fixing with adhesive and mechanically.
[IW4-4-10]
-
Internal walls. For plastered walls. Fixing with adhesive and mechanically.
[IW5-10-12]
-
Internal walls. For timber/ metal frames, with 300/ 400 mm centres.
[IW5-20-60]
-
Internal walls. For timber/ metal frames, with 600 mm centres.
[IW6-4-60]
-
Internal walls. For intermediate plywood layers on a timber/ metal frame. To be fixed with adhesive.
[IW6-12-60]
-
Internal walls. For intermediate plywood layers on a timber/ metal frame. To be fixed mechanically.
[IW7-10-12]
-
Internal walls. For intermediate plasterboard layers on a timber/ metal frame. To be fixed mechanically.
[IW7-20-60]
-
Internal walls. For intermediate plasterboard layers on a timber/ metal frame. To be fixed mechanically.

Size (l x w)

[1250 mm (±5 mm) x 600 mm (±2 mm)]
[2500 mm (±5 mm) x 600 mm (±2 mm)]

Thickness

[4 mm]
-
Thermal resistance (R-Value): 0.11 m²K/W. Board weight: 2.3 kg.
[6 mm]
-
Thermal resistance (R-Value): 0.17 m²K/W. Board weight: 2.4 kg.
[10 mm]
-
Thermal resistance (R-Value): 0.28 m²K/W. Board weight: 2.7 kg.
[12.5 mm]
-
Thermal resistance (R-Value): 0.35 m²K/W. Board weight: 2.8 kg.
[20 mm]
-
Thermal resistance (R-Value): 0.56 m²K/W. Board weight: 3.1 kg.
[30 mm]
-
Thermal resistance (R-Value): 0.83 m²K/W. Board weight: 3.4 kg.
[40 mm]
-
Thermal resistance (R-Value): 1.11 m²K/W. Board weight: 4 kg.
[50 mm]
-
Thermal resistance (R-Value): 1.39 m²K/W. Board weight: 4.2 kg.
[60 mm]
-
Thermal resistance (R-Value): 1.67 m²K/W. Board weight: 4.5 kg.

Manufacturer details

Caxton House,
101-103 Hopewell Drive,
Chatham,
Kent, ME5 7NP
Tel +44 (0)1634 835290
Fax +44 (0)1634 835299
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